/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import dalvik.system.VMDebug;
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import java.io.IOException;
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import org.apache.harmony.dalvik.ddmc.DdmVmInternal;
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/**
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* Program used to create a heap dump for test purposes.
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*/
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public class Main {
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// Keep a reference to the DumpedStuff instance so that it is not garbage
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// collected before we take the heap dump.
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public static DumpedStuff stuff;
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public static void main(String[] args) throws IOException {
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if (args.length < 1) {
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System.err.println("no output file specified");
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return;
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}
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String file = args[0];
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// If a --base argument is provided, it means we should generate a
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// baseline hprof file suitable for using in testing diff.
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boolean baseline = args.length > 1 && args[1].equals("--base");
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// Enable allocation tracking so we get stack traces in the heap dump.
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DdmVmInternal.enableRecentAllocations(true);
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// Allocate the instance of DumpedStuff.
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stuff = new DumpedStuff(baseline);
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// Create a bunch of unreachable objects pointing to basicString for the
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// reverseReferencesAreNotUnreachable test
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for (int i = 0; i < 100; i++) {
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stuff.basicStringRef = new Object[]{stuff.basicString};
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}
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stuff.shouldNotGc();
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// Take a heap dump that will include that instance of DumpedStuff.
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System.err.println("Dumping hprof data to " + file);
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VMDebug.dumpHprofData(file);
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}
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}
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